36877721 has 2 divisors, whose sum is σ = 36877722. Its totient is φ = 36877720.

The previous prime is 36877699. The next prime is 36877723. The reversal of 36877721 is 12777863.

36877721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36772096 + 105625 = 6064^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36877721 is a prime.

It is a Sophie Germain prime.

Together with 36877723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (36877723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18438860 + 18438861.

It is an arithmetic number, because the mean of its divisors is an integer number (18438861).

Almost surely, 2^36877721 is an apocalyptic number.

It is an amenable number.

36877721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36877721 is an equidigital number, since it uses as much as digits as its factorization.

36877721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 36877721 is about 6072.7029402071. The cubic root of 36877721 is about 332.8546982766.

The spelling of 36877721 in words is "thirty-six million, eight hundred seventy-seven thousand, seven hundred twenty-one".